Tool and work holder and driver.



1, H. HAMMON.

10m AND WORK HOLDER AND DRIVER APPLICATION ULEB MAY 29,19l5.

1,239,268. PatentedSept. 4, 1917.

2 SHEETSMSNEE l.

INVENTOH:

JAMES H. HAMMON, OF VINCENNES, INDIANJH T001 AND WORK HOLDER AND DRIVER.

Specication of Letters Patent.

Patented Sept. 4, 1917.

Application tiled Hay 29, 1916. Serial No. 100,658.

To all whom. t may concern: i

Be it ,known that I, J AMES H. HAMMON, a citizen of the United States,residing at Vincennes, in the county of Knox and State of Indiana, haveinvented a new and useful Tool and Work Holder and Driver, of which thefollowing is a specification. reference being had to the accompanyingdraw ings and to the letters and figures of reference marked thereon,

This invention relates to holding and driving mechanism for tools andwork or articles to be Worked on by the tools, the in'- ventionhavingreference more particularly to mechanism that is adaptable forlensgrinding machines or for machines in which cams or eccentrics may beproduced.

Au object of the invention is to provide an improved mechanism thatshall be so constructed as to be useful for various urposes and moreparticularly for hol ing and driving tools and work when it is requiredto produce curved surfaces, such as spherical, cylindrical or toroidallens faces, or cam or eccentric faces on parts of machinery.

Another object is to provide improved gearing for the above mentionedpurposes and means for mounting the gearing on various machines whererequired,.and which shall be capable of doing'work expeditiously,accurately and economically.

A still further object is to rovide gearing of the above mentionedcharacter that shall he so constructed as to be adapted to be variouslydriven or operated by means of various types of machines.

With the above mentioned and other objects in view, the inventionconsists in an improved tool holder and driver and :in improved workholder. and gearing adapted for rotating the tool holder and the uorkholder at one and the same speed; the invention consisting further inthe novel parts, and in the combinations and al rangements fof parts, ashereinafter particularly described and further set forth in theaccompanying claims- Referring to the drawings, Figure l is :1 frontelevation oi' l suitable type of lensgrinding machine to which theimproved mechanism is applied as illustrating one of the purposes of theinvention; Fig. 2 is u. perspective view of one form of lap that may beused in connection with the iniroved mechanism; Fig. 3 is a top plan ofF ig. l partially broken away and minus the iep; Fig. 4 is a centralsectional elevation of the grinding machine and improved mechanism; Fig.5 a. perspective view of a frame member of the improved mechanism; Fig.6 is a central section of the principal elements of the improvedmechanism; Fig. 7 is a pers active view of one of the gear wheels of t emechanism; Fig. 8 is a front elevation of a turning lathe equipped withthe invention as illustrating the manner in which the mechanism isadapted to be employed for producing cani or eccentric faces; Fig. 9 isa transverse section ap proximately on the line A A on Fig. 8; 10 is a.fragmentary section approximately on the line B B on Fig. S; Fig. 11 isa central section of the improved mechanism slightly modified so as tobe ada ted for producing cams or eccentrics; F i 2 is a sectional detailof the Work holder Sii htly modified so as to hold and drive a mlingtool; and Fig. 13 is a erspedtive View of the elements shown in t 1epreceding figure.

Like characters of reference on the various figures of they drawingsindicate like elenie-nts or features of construction herein referred toin detail.

The invention being especially valuable in the rapid and accurateshaping of the surfaces of lenses, and particularly such as thosedesigned for eye-glasses, the invention will be first described asapplied to a lensgrinding machine which comprises legs or a support` 1,upon which is a table 2 that usually supports a -pan 3. the table beingprovied with a journal box 4 in which a vertical driving shaft 5 isrotatably mounted und provided with means for driving it, usually apulley 6. The table has a suitable standard 7 thereon outside of thepan, the top of the standard being adapted to support parts of theimproved mechanism and preferably provided with a stud 8, on which is anut 9 and a washer 10 under the nut. An arm 11 is arranged upon thestandard and extends over the top of the pan 3 and is secured to thestandard by means of the stud and the nut, the arm preferahl having aslot 19 therein reoeivin f the stu so that the arm is longitudinalyadjustable on the standard. The frame arm 11 is provided with a hearingboss 13 which is provided with a set-screw 14:, the boss being adaptedto su port a frame member of the mechanism eit ier movably or fixedly topermit adjustment of the member.

Forthe purposes of the invention as ap plied to a lens-grinding machinea toothed driving wheel 15 is secured bo the shaft 5 above the bottom ofthe pan 3, the wheel having a hub 16 on its upper side provided with aset-screw 17 wherebyr the wheel in the present case is secured on theshaft. The top of the hub has a socket 18 therein that is adapted toreceive the shank 19 of a. lap 20 which may be variously shaped, in somecases having a convex working face 2l adapted for grinding` acylindrical lens face thereon, in seine cases havin a face 22 that isconvex to a greater degree in one direction than in the transversedirection.

The invention includes a frame member which comprises a main portion 23having a cylindrical portion 24 whereby the member is supported, andwhen connected with a lens-grinding machine is vertically ar ranged iiithe bearing boss 13 and supported for vertical adjustment by means of acollar 25 having a set-screw 26 whereby the collar is adj ustablysecured on the supporting portion 24, the collar normally resting uponthe hearing boss. The main portion 23 and the portion 24 are hollow, a`bore 2i' extending therethrough and provided with journal boxes 28 and29 in which a main shaft 30 is rotatably mounted.` A toothed wheel 3l isxed on the shaft 30, preferably being advinstable on the slnift, and theframe arm 11 eilig properly adjusted, the wheel 30 is maintained ininesh with the driving wheel 15. Another toothed wheel 32 is fixedlysecured to the upper portion of the shaft 30 and is supported upon theframe portion Q3 or the journal box 28. The fraiiic member comprisesalso an arm 33 which is lined to the main portion :'23 and the arm has ajournal box 31 thereon in which is a bore 35 parallel lwith the mainshaft 30. vAnother toothed wheel 36 is provided which has :i journal 3i'on its normal under side that is rotatably arranged in the bore 35 ofthe box 34, the wheel 3G beingr in 'mesh with the wheel 32. Preferablythe wheels 3l and 32 are of equal diameter and 15 and 3G of equaldiameter.` `it being essential that the wheel 36 be rotated at the sainerate :is the wheel 15. A bore 38 extends through the wheel 3G and theiournal'37, the upper portion of the wheel 36 having;` a vertical socket39 therein. The wheel 36 is arranged upon the top of the journal box 34,and the lower portion of the .journal 37 is provided with a collar 40ari-aimed at the under side of the journal box. shaft-or tool-spindle 41is arranged so as to be longitudinally movable in the bore 38 and has acollarQrseeured to the' upper portion thereof, preferably adj ustable bymeans of a set-screw 43, the collar being provided with a dowel-pin 44that extends into the socket 39 whereby to enable the wheel 36 to rotatethe shaft 41 and pci'- niit the shaft to be adjusted rotatively in thewheel 36, the shaft being readily moved longitudinally by hand by meansof the collar. Near its lower end the shaft 4l is provided with a sprin-seat 45 on which a spring 46 is arranger that is seated against thelower end of the journal 37, for normally forcing the shaft downward.The lower end of the shaft 41 is provided with a ball-shaped head 47having a transverse driving pin 4S, for rotating a lens holder or block49 which has a socket therein to ieceive the head 47 and a slot 50 toreceive the pin 48, so that the holder may wabble as it carries the lensblank 51 and rotates it upon the lap.

As illustrating another one of the uses to which the invention is withslight modification adaptable, the mechanism is shown as it may beconveniently applied to a turning lathe, a fariiiliar type of whirhcomprises a bed 52 oii which is mounted a` head stock 53 and a tailstock 54, the latter supporting a spindle 55 carrying the dead center56. The live spindle 57 is mounted in the head stock and usually carriesthe live center 58, the latter in the present case, however, beingotherwise carried as will be further exlaiiied. A carriage 59 is mountedon the )ed 52 and supports a transversely movable slide 60 which carriesa tool post 61 provided with a setscrew 62.

The invention includes a spindle section G3 which is provided with asocket 64v that is screwed onto the end of the spindle 57 in the placeusually occupied by the face platev of the lathe, so that the spindlesection praetically constitutes a portion of the driving shaft of theimproved mechanism and has a toothed wheel secured thereto and beyondwhich the face plate 66 of the lathe is screwed onto the spindleextension, the latler receiving the live center 58 in its end. The wheel65 corresponds in diameter to the wheel 15. The frame member of theimproved mechanism is conveniently supported by nir-:ins of an arni 67which is secured to the rear side of the lied 52 and extends npwai'd andforwardly and is provided willi a bearing boss G8 which receives androtatively supports the cylindrical portion 24 of the frame member, theportion 24 havingr a collar 25 on one side and a similar collar 25' enthe opposite side of the boss. the collars preferably being adjustablysecured in place. The arrangement is such that the portion 24, of theframe member is horizontally supported Vabove the blank 69 that is to beworked on, and which has an arbor 70 that is supported by the lathecenters, the

blank or its arhol heilig driven by suitable means such as a carrier ordoo lois-*ing eennections with the fue@ plato of tho lathe. Thusarranged the wheel 3l 'is meintained in mesh with the wheel G5 for roiuiting the iii-fain shaft 30 and algo the wheel 525. ln this enrangement the set-Screw lil omitted from the bearing bone in order topermit the arm 33 to swing Slightly about the shaft 3C?.

The devices whereby the tool is carried end driven are slightlyr modii-`l Whe the mechanism required to ope-reto e` milling.; tool or othertype of iool in si inthe or torn ing machine. A. toothed wheel 3%'corre-- eponding to the Wheel 36 ie provided with a journal 37oorreeponding to Lin; joimlnl il? and rotatably mounted in the join-mll-o 34, the wheel 36" being in mosh. with the wheel 32. A spindleoxfehel't 7l is armnfed in the wheel 36 and itsnjoinnah so ne to herotated thereby and permit longitudinal movement of the Spindle7 theleiter prefer ably being provided with a snline *l2 adopted for thepnrpoee. A suitnlllr milling tool YB is secured to the spindle oreli-.itt "Jl mol may be variously cnmtrncted lo details and contour, theperipheral con-tolli of the tool determining `the peripheral simile ofthe finished Work produced on the lnlilnl., tlmt of a cam or aneccentric A eoll'ar il le ilocurefkln fixed on the spindle or sliel't 7l:and between item1 the hub of the lool e box is arranged and permits thespindle to 1 thereon the len; honig ermugod in o enI l holder wlnlh loogrf nous@ .i lnlr Til t* le secured m the tool met of they luth andprovided with wie 'j' T in wrioll tlv? i H; 1I-w la Y :u 1e errang: l mionwil Ll-lgoe to guide the i lin-.llo ox il om* und parallel n m2o. Work69 or Ito Lu'lioi, l

.l fo moe we spindle 7l longitudinally in order to fred thetool alongthe luce of lli(- hlank to produce a peripheral tace T8 col-respondingto the peripheral vontonr of tho tool, the feeding being accomplished inthe usual man nel' by the lathe mechanism. and the ndjnzstnient of l'hetool to ille rio llt-ing eccomplir-lled through the odio nent of thetool post on the onwillige ot' tho lathe :is is one tolnary.

In the description of the imuifnnienl :te employed for differentpurpoees, it has heen explained that the driving shaft carries -the tooland the driven shaft or spindle carries the work in a lens-grindingmztcliinc, and that in thu :applivution of the mechanism to :1turningiu-lf-liine the tool is carried hy the driven shaft or' spindlewhile the work is 'lrixn and muy lao married liv he driving Shaft. It i5nhvions thcroloie that either relative zumngi-invul; of the work and thetool may he resorted to, according; to circumstances or requirements, :tbeing evident howeven that in either ease the work holder and tho toolholder nre ioteted'sn parallel axes et th suono Hinwil :and in the sinnedi motion.

reptil? sind el 'oilily ir-Mall sie' 5m The elisifte or Eoinllos :tn-vvertically ranged :is :1 mutter of expediency. YWinoo the improvedi'oefrlmniein le omglloveul lo? producing oaxns or Comunit-ivo theShafts of #if ile ol' the nlelflmnif-:m :we more con emilio@ ilr lllimgllwlill lul' shrill 'Il 1f vontl'ollocl :is may lio dosilxli orilfnuizwi 'in ordssi that the lons-'linko of" ho iinl'liw wft om-l"Airnl :shall lo performed plated;

Having time, doelrlwel the intention, what fl-iiiowo :is new l, tool:irri "-Aolli lmlllm' and l' L sapporliolfI-:im lowing; i limiL4ing-miete nml lluffimgf .liso o lmet, portion lo im voort-tl lm' wwwaoton :1 mail] oppor-t. fi 'iffrmw inwol lmp-:lng iw-nmol l'olzlY liwljv'llfzaloiml n llil-` :Ulli lzrll in; Also :an :um wml-[lul il o.ioiilllul imm. :l eliindle! volmoolonl--d in liza join nel 'box andprovi-'lo l with e toothed driven wheel for rotating it.y :i onlinSlol'lt rotatably mounted in the tramo member und extendim;ltherethrough nml also through the jour nel thereof, :l lootliml wheelsecon-l to the 11min Hlinft :1mi meshing with the driven wlwol, :i`rotatable toothed lllixinff lslifwl` :unl :i tooihed rmiwlwol secured tollo malin s eff, ond meshing with the driving wht-el.

i?. A tool and work holder :nld driver including a supporting-:urnhaving n beure ing-hose end having also e hase portion to he secured toe main support, n frame momber beting e. cylindrical portion and :lisovan :arm provided with u journal bon` the cylindrical pol-lion lio-ingrota-tively eupglwlwl in iho heen-ing bose, n toothed i1-imm oli-,rellowing t hollow journal rotatably mounted 'in the joui-nul box` 1i:spindle tending llnomfn the driven wheel :md its; lomrrod to 'herotated lherehy, the Spindle being longitudinalily-movzible :md adapted1 1 i Low mi; Lm) mi) lllll to euri-)f inni li-iw a rotary operatingdeviem a main shaft rotinnblj' mounted in the traine meiber, :i toothedwheel seenreizl to the mein slnilt and meshing with the [lr-iron wheel`:1nd (hiring monthl omineoteil with the moin shaft'.

t il. fool :mii Wbrh hol/ier unil ihiwr inolinlinff :L importedhenringhlioezfi. :i rnintnblrdriving npnnlh. :in extension .spindlehaving n socket connected to the driving spindle und provided with :irarrier eleriee. :i frame member roteively nionntedin the bearing bossand haring nl :mn thereon and provided with :i journal box, a tootheddriving Wheel secured no the extoiriion soindhn :i milio ehn'ltrotnt'fiblv mounted in thv immo iin-miller. n iliwn Hpinilie iwf-stablymonntod in the journal box :ind inovzble limigjifndinnlly Herein, a`toothed driven whwfl for rotating the driven lnpiznle von neen-Ll with:1nd permit ng hingzitndiniil movement of the nplmile` a toothed geninhs-ei moreel to the main shaft'. and megan in; with the drivin wheel, ntoothed Een? wheel seemed to ihr.A mitin shaft and meeleinn with hedriving; wheel, :ind an oneint ing: ilovice secured to the drivenepiniile fl. ln :e lool und work holder and llriier1 the ronibinntionwith n` main Support` noel n drivingr shalt rotatably mounted in thesujigiorr, of :a footbed driving wheel romeniA ed on the driving shaftto be :'otneil therein sind having :i carrier device to be rotated in'menos of the driving' slniit'. n frame men bei` :nippon-ieri by therollin enpport and hui;- ing en Hrm thereon lhn in provided. with ejournal box, u onlin shaft i'ofatably mount-- ed in the ironie rnonihor,a iootheil wheel ir-mired lo the onlin shaft and meshing with thedriving wheel ai footbed liiron Wheel boring u bollo joornnl rotatablymounted in` the jonrnnl box. n toothed wheel Hei-nrefl so the :nainelnifl anni ineihing' with tho riwn Wlnel. :unl i spindle extending:cnronji the driven irlniel :nifl its journal lo iw, Votami ilnrobjz illespindle being lon'- nitni-'Einiilijf movable-i and beingr adapted to'nrrji und drive u rotary operating: device. ln :i lool :mil noa-lrholder und iriver` through the driven mamas frame, a provided with thecombination, with :i miiehine driving spindle. on the frame i1 toothmidriving.;l wheel, n ein-rior device oonnecfted with the driving'spindle. nml an :intonmtie tool-feeiling mechanism` of a. bearing bossstationnrily mounted on the muohio@ frame :i frame member rotutivelymounted in an@ supported by the bearing hose" the frame member thereonpsovided with a journal box, a main film ft roinzznbly mounted in theframe member, :a toothed Wheel secured to the main Shaft und meshingwith the driving Wheel, n. driven tool carrying' spindlel rotatablymounted in the journal box and movable lmigitndinully therein. a tootheddriven whe-el eonnerted with the driven Spindle for rotating thespindle, :i toothed'gear Wheel eUni-oil to the main shaft und meshingwith the driven wheel, :lndlneims for connecting rh-f lool feedingmechanism with the toolsim-*ving Spindle to longitudinally move theiooinniarrying epindle.

o. In. :i tool and work holder :incl driver, the f-omliiinntion with uybearing bons, of a mlon' frame mewbel having :l lateral arm nem' ono endthereof, the member having a aylinilriral portion extending from theoppositn und thereof that is rotatively mounted in the bearing bossi the:irm being provided with a journal box, journal bearings supported inthe frzune member adjacent to the ends thereof, a main shaft rotativelySnppm'ted by the. journal bearings and provided withedriving devieeatoothed. driven wheel having si hollow journal rotatably mounted in thejournal box. a toothed wheel secured to the moin shaft and meshing withthe driven wheel, a spindle extending wheel and its journal to berotated thereby, the spindle being' lonzitlzdinally-niovable. and thespindle longitudinally in one direction. In testimony whereof, I alix mysignature presence of two Witnesses.

JAMES H, HAMMN.

Witnesses CHARLES CROWLEY, HARRY R. LEWIS.

having i lateral armK means for moving"

